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1 Tijdschrift voor Rechtsgeschiedenis 78 (2010) Revue d Histoire du Droit 78 (2010) The Legal History Review 78 (2010) Pre-contractual duties to inform in Early Modern Scholasticism Wim Decock and Jan Hallebeek Summary This paper seeks to highlight the early modern scholastic contribution to dealing with the issue of pre-contractual duties to inform. Bringing together different strands of thought, ranging from Aristotelian philosophy to Roman law, the 16th and 17th century scholastics developed adequate analytical tools to solve legal and moral problems arising from information disparities between contracting parties. While first looking at the different classical and medieval texts that shaped the early modern debate, this paper then goes on to give a systematic account of how the early modern scholastics dealt with duties of disclosure about both intrinsic and extrinsic defects in the merchandise. A final chapter looks at how the early modern scholastic debate was received in the Northern natural law school, before concluding that the early modern scholastics took a surprisingly negative attitude towards duties to inform. Keywords Early Modern Scholasticism, pre-contractual duties to inform, latent defects, Merchant of Rhodes, forum internum 1. Introduction In a recent volume, Mistake, fraud and duties to inform in European contract law, case studies taken from different countries highlight how important the pre-contractual duty of the seller to disclose the necessary information concerning his merchandise has become in most European jurisdictions. A case in point is the Dutch Civil Code (1992), which considers the information provided by the seller as determinative for the expectations of the purchaser (art. 7:17 BW), and concludes that non-conformity lies if, eventually, the * Wim Decock, Research Fellow FWO-Vlaanderen, K.U. Leuven, Research Unit Roman Law and Legal History, Sint-Michielsstraat 6, B-3000 Leuven; Jan Hallebeek, Professor of European Legal History, VU University Amsterdam, Faculty of Law, De Boelelaan 1105, NL-1081 HV Amsterdam.The authors wish to thank Professor Margaret Hewett (University of Cape Town) for correcting the English of their text. Koninklijke Brill NV, Leiden, 2010 DOI: / X487332

2 90 W. Decock, J. Hallebeek / Tijdschrift voor Rechtsgeschiedenis 78 (2010) object sold does not meet those expectations (art. 7:21 BW ff.) 1. The seller is then considered not to have fulfilled his duties of disclosure. The editor of that volume, Ruth Sefton-Green, wonders whether the strong emphasis on the seller s duty to inform should be seen as a shift from formal validity to contractual fairness: is the contemporary law of sale characterized by a turn towards substantial, equitable standards? Is it leaving behind the rather formal, and minimal standards required in the civilian tradition 2? Interestingly, the volume edited by Sefton-Green also contains a chapter dealing with the historical roots of the contemporary debate on duties to inform. In this respect, Martin Josef Schermaier points out the importance of early modern scholastic doctrine and case-law for the development of our present-day concepts of mistake and duties of disclosure. Schermaier recalls how the theologians grappling with a case known as the Merchant of Rhodes, as well as their more theoretical discussions about intrinsic defects in the merchandise shaped the debates 3. The Merchant of Rhodes questions the seller s duty to disclose his knowledge about future market conditions that are thought to be much more advantageous to the buyer than the current conditions. Contrary to the great lawyer and orator Marcus Tullius Cicero ( BC) who initiated the debate in his work De officiis (On duties), the early modern scholastics conclude that the Merchant of Rhodes does not have a duty of disclosure. His personal knowledge that the market-price will shortly decrease is not a defect in the merchandise itself, but a defect in the circumstances under which the sale is concluded. Hence no duty of disclosure exists. Moreover, whether intrinsic defects invariably give rise to a pre-contractual duty to inform, is in itself not easy to answer, as will appear below. It is the aim of this paper to investigate the most vivid discussions on the duties to inform about intrinsic as well as extrinsic defects surrounding the object of sale in early modern scholasticism. First we will highlight the classical and patristic origins of the debate in Aristotle ( BC), Cicero, the Corpus Iustinianeum, and Saint Ambrose ( ). Indispensable, too, is an overview of the seminal contributions made by Thomas Aquinas ( ), Bartolus de Saxoferrato ( ), Gabriel Biel ( ), and Konrad Summenhart ( ) in the 1 The subject has also a topical interest in view of the forthcoming debate concerning the Proposal for a Directive of the European Parliament on Consumer Rights (SEC/2008/2544) and its subsequent implementation in the near future. 2 See R. Sefton-Green, General introduction, in: R. Sefton-Green (ed.), Mistake, fraud and duties to inform in European contract law, [The common core of European private law, 5], Cambridge 2005, p Cf. also M.J. Schermaier, Die Bestimmung des wesentlichen Irrtums von den Glossatoren bis zum BGB, [Forschungen zur neueren Privatrechtsgeschichte, 29], Wien etc. 2000, p See Schermaier, Mistake, misrepresentation and precontractual duties to inform, the civil tradition, in: R. Sefton-Green (ed.), Mistake (supra, n. 2), p and p

3 W. Decock, J. Hallebeek / Tijdschrift voor Rechtsgeschiedenis 78 (2010) later Middle Ages. As regards early modern scholasticism itself, however, a twofold limitation has thrust itself upon us, taking into account the great number of authors participating in the early modern scholastic movement as well as the wide range of their treatments of duties to inform. For the first half of the sixteenth century we have focussed on the philosopher John Mair (ca ), who taught in Paris, and the Dominican theologians Francisco de Vitoria (1483/ ), and Domingo de Soto ( ), who dominated the debate in Salamanca. To broaden the background, we have also included the Franciscan friar Antonio de Córdoba ( ), Juan de Medina ( ), who was a dissonant voice from Alcalá de Henares, the canonist and bishop Diego de Covarruvias y Leyva ( ), and the Augustinian friar Pedro de Aragón (ca ). For the end of the sixteenth century and the beginning of the seventeenth, as the Jesuits take the leading role in developing early modern scholastic moral and legal thought, we have selected Gregorio de Valencia ( ), Luís de Molina ( ), Lenaert Leys (Leonardus Lessius) ( ), and Juan de Lugo ( ) 4. As to the contents of the debate, we have restricted ourselves to one specific intrinsic defect, namely the defect known to the seller in the quality of the merchandise, and to one specific extrinsic defect also known to the seller, namely the circumstance that the market-price may shortly be expected to decrease. 2. The Classical and Medieval heritage 2.1. Greek, Roman, and patristic sources Typically, the early modern scholastics drew on a number of intellectual traditions in order to address the problem of pre-contractual duties to inform. Although they often express their thoughts as an explicit commentary on Thomas Aquinas, it is obvious that through their intellectual father s thinking they were first and foremost imbued with Aristotelian notions of justice in exchange and voluntariness as one of the foundations of moral action. In Book III of his Nichomachean Ethics Aristotle develops the argument that man is responsible for his acts only to the extent that he acts freely and in the absence of ignorance or compulsion. Accordingly, mistake and duress undermine free human action. Whatever is done by virtue of ignorance is not voluntary. Moreover, a person can be blamed or praised only for actions that he performs voluntarily. So a man is not responsible for his actions if he 4 Succinct bio-bibliographical information on these as well as other scholastic authors (period from ca to 1800) is now available on Jacob Schmutz s (Université Paris-IV Sorbonne) website:

4 92 W. Decock, J. Hallebeek / Tijdschrift voor Rechtsgeschiedenis 78 (2010) is carried away by a hurricane. But what about a captain who throws his goods overboard in a storm in order to save the crew? At the moment of action, he definitely wishes to jettison cargo, but he would definitely not have wished to do so in the abstract. So there is also a category of actions that are mixed 5. Aristotle seems to conclude that such forced acts are nevertheless voluntary acts. Thomas Aquinas carries this further and in his Summa Theologiae says that the captain acted voluntarily simpliciter, that is, here and now, and involuntarily secundum quid, that is, as such apart from the actual circumstances 6. Aristotle added some further grist to the mill of future discussions on voluntary consent in book V of his Nichomachean Ethics, where he asserts that no one is treated unjustly, if he consents 7. It is echoed in Roman law, for instance in D. 47,10,1,5, where it is stated that that is no injury which is done to one who consents (nulla iniuria est quae in volentem fiat) and in D. 39,3,9,1 (nullam enim potest videri iniuriam accipere qui semel voluit). Yet it would be naive to jump to the conclusion that Aristotle laid the foundations of the modern principle of contract law to the effect that will is a sufficient condition of justice. In the same book V we find Aristotle developing a theory of justice in voluntary and involuntary transactions, which indeed stresses the need for equilibrium (contrapassum). Among voluntary transactions he puts contracts, among involuntary actions what today pertains to the law of delict or to criminal law. In his Summa Theologiae, Aquinas denotes justice in voluntary transactions as commutative justice (iustitia commutativa) and uses aequalitas to render the Greek word for equilibrium in Latin. In this manner, the foundations of the scholastic doctrine on justice in contractual exchange were laid. The Aristotelian-Thomistic principle of justice implies that in case of defective merchandise the selling price should correspond to the defective quality of the object sold. A second authoritative tradition is that of Roman law, certainly in its Medieval form. It should be noted, first, that the Corpus Iustinianeum contains a case which, when combined with considerations of Aristotelian equality and justice in exchange, would give rise to the doctrine of the just price and the doctrine of laesio enormis as found in the writing of the scholastics and canonists of the later Middle Ages. In C. 4,44,2 a seller suffers prejudice because his real estate is sold for less than half of the normal price. The buyer is then expected to pay the rest of the price, or to make restitution of the 5 See Aristotle, Ethica Nicomachea, 3, 1, 1110a4 19. We consulted the following edition: Aristotelis Ethica Nicomachea, recognovit brevique adnotatione critica instruxit I. Bywater, [Scriptorum classicorum bibliotheca Oxoniensis], Oxonii [=1894], p Thomas Aquinas, Summa Theologiae, IaIIae, quaest. 6, art. 6, resp. We consulted the following edition: Prima Secundae Summae Theologiae a quaestione 1 ad quaestionem 70, in: Thomae Aquinatis opera omnia iussu impensaque Leonis XIII edita, tom. 6, Romae 1891, p Cf. Aristotle, Ethica Nicomachea (supra, n. 5), 5, 11, 1138a12, p. 112.

5 W. Decock, J. Hallebeek / Tijdschrift voor Rechtsgeschiedenis 78 (2010) estate. The notion of just price (pretium justum) is mentioned in this connection not to protect a buyer, however, but to protect a poor seller 8. Moreover, the buyer is liable not for simple but for extreme prejudice. In the Middle Ages this passage from the Codex was applied more generally to all types of cases where either a seller or a buyer was deceived. Thus was born a general doctrine holding that deceit for more than half of the just price amounted to great prejudice (laesio enormis) 9. While the civilians insisted that an action on laesio enormis could only lie if the price exceeded more than half of the just price 10, the canonists and early modern scholastics considered any deviation from the just price as a sin against the virtue of justice 11. Even though from the civilians point of view a buyer could not always justify rescission on the basis of C. 4,44,2, there was still the possibility to sue the seller on account of latent defects. At least if the seller could be assumed to have known or to have had a duty to know about these latent defects. According to Roman law, this knowledge in the pre-contractual stage would have resulted in full contractual liability (under the actio empti), that means for all damages including consequential losses 12. Yet another technical distinction, constructed on the basis of Roman legal sources, needs mentioning here: the distinction between two kinds of deceit, viz. dolus causam dans contractui and dolus incidens in contractum. This distinction was developed through a confusion, once more of the Corpus Iustinianeum and Aristotelian philosophical terminology in the Middle Ages on the basis of D. 4,3,7pr. It was developed by the Bolognese glossators and 8 That Justinian did not mean to establish a general doctrine of just pricing is argued, also with reference to the historical context, in R. Zimmermann, The law of obligations, Roman foundations of the civilian tradition, Cape Town 1990, p See J.W. Baldwin, The Medieval theories of the just price: romanists, canonists and theologians in the twelfth and thirteenth centuries, Transactions of the American Philosophical Society, 49 (1959), p. 3 92; and K.S. Kahn, Roman and Frankish origins of the just price of medieval Roman and Canon Law, New York See the gloss Iudicis ad C. 4,44,2. 11 The just price should not be considered a static or objective standard, however, as Johann Gottlieb Heineccius ( ) wrongly thought the scholastics held it to be. In the early modern scholastic conception, the just price is simply the market price under competitive circumstances, or the price set by the public authorities taking into account market factors like scarcity and abundance; cf. O. Langholm, The legacy of scholasticism in economic thought: antecedents of choice and power, Cambridge 1998, p See D. 19,1,13pr. and D. 19,1,6,4. The early modern scholastics, however, pay more attention to the aedilitian remedies of Roman law, which could only be used during a limited time for rescission (actio redhibitoria) or price reduction (actio quanti minoris), not for all damages. This may be due to the fact that in his Quodl. II q. 5 art. 2, Thomas Aquinas speaks about the provisions of civil law in case of an animal morbosum. Cf. Quaestiones de quolibet, in: Opera omnia iussu Leonis XIII edita, cura et studio fratrum praedicatorum, tom. 25, vol. 2, Parisiis Romae 1996, p The word morbosus is reminiscent of the morbus of animals, literally mentioned in the texts of the aedilitian edicts. See D. 21,1,1,1 and D. 21,1,38.

6 94 W. Decock, J. Hallebeek / Tijdschrift voor Rechtsgeschiedenis 78 (2010) we find it in Azo ( 1220) 13 as well as in the Ordinary Gloss of Accursius (ca ). When the buyer would not have bought the object at all if he had known of the defect, there was dolus dans causam contractui. He was deceived in the essentialia of the sale. As a consequence such a sale was void. When the buyer, however, still would have bought the object, when he had known the defect, albeit for a lower price, there was dolus incidens. He was deceived in the accidentalia of the sale. The contract was valid, although the buyer could claim damages 14. A third strain of thought, in addition to the Aristotelian and the Roman law tradition, which runs through the early modern scholastics debates, stems from De officiis, a work of Cicero on moral philosophy, written around 44 B.C. Certainly, with regard to the discussions on the duty to disclose information about external circumstances to a contract, Cicero s De officiis proved to be vital in that it contained the case of the Merchant of Rhodes 15. The story goes as follows. An honest merchant is shipping grain from Alexandria to the island of Rhodes, where prices have raced up and people are dying from starvation. At the same time, he knows that many more grain merchants are setting forth to Rhodes. They will be arriving there in the near future. The qualm of conscience he faces is whether or not he is morally obliged to disclose his information about the additional relief which is on its way. If he does, he fears that he will fail to make huge profits. If he does not, the wretched buyer will suffer damage 16. In fact, this case is set against the background of Cicero s larger, and typically Stoic discussion about the wrongfully perceived antithesis between the morally right (honestum) and the expedient (utile). Cicero tackles the problem of the Merchant of Rhodes as well as duties to inform about intrinsic defects in an attempt to show that it is a mistake to believe that dishonesty and morally irresponsible behaviour are the necessary prerequisites for material success. In his view, honesty leads to honour 13 See, e.g., Azo, Summa Codicis, ad C. 4,49, Lugduni 1559, f. 111va, num Further literature: Zimmermann, The law of obligations (supra, n. 8), p ; A. Wacke, Circumscribere, gerechter Preis und die Arten der List (Dolus bonus und dolus malus, dolus causam dans und dolus incidens) unter besonderer Berücksichtigung der 138 Abs. II und 123 BGB, Zeitschrift der Savigny Stiftung, Rom. Abt., 94 (1977), p Cicero s discussion of the Merchant of Rhodes was studied against the background of Roman sales law by D. Waibel, Aufstieg und Fall des alexandrinischen Getreidehändlers, Ausgewählte Informationsprobleme beim Kauf von Cicero bis Savigny, in: M. Ascheri e.a. (eds.), Ins Wasser geworfen und Ozeane durchquert, Festschrift für Knut Wolfgang Nörr, Köln Weimar Wien 2003, p Contrary to what the title of this contribution might suggest, it does not contain a single reference to the vast reception of the case in the late Medieval, Renaissance, or early modern period. As to its reception in humanist authors like Caspar Barlaeus ( ) in the Netherlands, see W. Decock, Leonardus Lessius en de koopman van Rhodos, Een schakelpunt in het denken over economie en ethiek, De Zeventiende Eeuw, 22 (2006), p Cicero, De officiis, 3, 12, 50. We consulted the following edition: Cicéron, Les devoirs, livres II et III, texte établi et traduit par M. Testard, [Collection des Universités de France], Paris 1970, p. 96.

7 W. Decock, J. Hallebeek / Tijdschrift voor Rechtsgeschiedenis 78 (2010) (honor), with honour being the very basis of utility (utilitas). But you cannot lead an honourable life unless you take into account other people s interests, and are perceived to do so. After all, even on an etymological level, there is an unmistakable connection between the Latin words for moral decency (honestas), and reputation (honor). Therefore, even if the Merchant of Rhodes is aiming at expediency, he should not think that he will be better off by availing himself of his private information to the detriment of his fellow human beings. For then his reputation will be ruined. Thus Cicero makes the case for a very large duty of disclosure. He takes the view of the Stoic philosopher Antipater of Sion that the buyer should not remain uninformed about any detail the seller knows, because the seller was born in this world as a member of a social community which naturally binds all people together (inter homines natura coniuncta societas), and the interests of whom he should serve and equate with his own interest 17. On the other hand, Cicero is said in the Thomistic tradition to believe with Diogenes of Babylonia that it would be absurd for a seller to think he is bound to send a messenger through the streets publicly crying out that the house he is selling is unhealthy 18. In fact, Cicero expressly disagrees with Diogenes of Babylonia, when he finds him defending the case of a very thin morality, namely asserting that a seller is allowed to look after his own interest as long as positive law does not expressly urge him to disclose his information to the buyer 19. According to Diogenes, the seller can abide by the market price, although he is not allowed to misrepresent market circumstances. Moreover, Diogenes makes a distinction between expressly concealing information that could be important for the other party to the contract, and simply keeping silent about his information 20. Yet Cicero, considering expediency and morality to be synonymous, demanded higher moral standards from businessmen. Not only was expressly trying to conceal information, let alone lying, morally objectionable in Cicero s eyes, but also merely keeping silent about defects 21. For would not the Merchant of Rhodes, would not a proprietor who does not disclose his information about the unhealthy state of the house he is trying to sell be considered a man who is sly, underhand and grown old in fraud, Cicero asks? And is not this ill reputation contrary to expediency 22? In his Christian adaptation of Cicero s De officiis, St. Ambrose of Milan, writing in approximately 388 A.D., points out the weaknesses in his pagan predecessor s argument, while at the same time strengthening his case for a 17 Cicero, De officiis, 3, 12, 53, (ed. Testard, supra, n. 16), p Cicero, De officiis, 3, 13, 55, (ed. Testard, supra, n. 16), p Cicero, De officiis, 3, 12, 51, (ed. Testard, supra, n. 16), p Cicero, De officiis, 3, 13, 57, (ed. Testard, supra, n. 16), p Cicero, De officiis, 3, 14, 58, (ed. Testard, supra, n. 16), p Cicero, De officiis, 3, 13, 57, (ed. Testard, supra, n. 16), p. 100.

8 96 W. Decock, J. Hallebeek / Tijdschrift voor Rechtsgeschiedenis 78 (2010) very large duty of disclosure of both internal and external circumstances to a purchase-sale contract 23. Referring to Plato s imaginative story, known as The ring of Gyges 24, about the effects of invisibility on moral behaviour, Ambrose lays bare the shame culture underlying pagan ethics. What is the force of Cicero s plea for the identification of expediency and honesty, if one s honour cannot be tainted by immoral behaviour, as is the case with Gyges, who is rendered invisible by the ring he wears? Christianity has much more argumentative force, says Ambrose. For a Christian is still left with the inner voice of conscience which can condemn him for acting immorally regardless of whether the shameful act was seen by other persons or not. A Christian is his own accuser 25. In fact, what we are witnessing here is the birth of conscience. It is the development of this conscience, conceived of as a court, the mechanisms and extent of which we will be able to observe in the works of the early modern scholastics. Nevertheless, as a rule the scholastics reacted fiercely against Ambrose s diatribe against speculative commercial activities. In a highly rhetorical piece of writing, Ambrose depicted and indeed destroyed the image of businessmen who prided themselves on their unflagging zeal and prudence in making large fortunes through speculation 26. In addition, Ambrose mentions, though tongue in cheek, that these businessmen claim support for their speculative activities from the Bible, and from Genesis 40 in particular, where Joseph is said to have bought up all grain stocks in Egypt on account of his knowledge of future shortages. Ambrose, however, sharply refutes those arguments, saying that Joseph had for his part not intended to make money through speculation, but to ensure sustained provisions of grain to the whole population. Moreover, Ambrose holds that profits made through speculation always lead to the detriment of the commonwealth, calling this so-called art of 23 An interesting, and comparative study of Cicero s and Ambrose s De officiis is M. Becker, Die Kardinaltugenden bei Cicero und Ambrosius: De officiis, [Chrêsis, Die Methode der Kirchenväter im Umgang mit der antiken Kultur, 4], Basel 1994, esp. p on the third book. 24 See Plato, Republic, 2, 3, 359b 360d. We consulted the following edition: Platon, La république, livres I III, texte établi et traduit par E. Chambry avec introduction d A. Diès, in: Platon, Oeuvres complètes, [Collection des Universités de France], Paris 1947, tom. 6, p Ambrose, De officiis, 3, 5, 29, in: Ambrose, Les devoirs, livres II et III, texte établi et traduit par M. Testard, [Collection des Universités de France], Paris 1992, p : Nihil agit sapiens nisi quod cum sinceritate, sine fraude sit ; neque quidquam facit in quo se crimine quoquam obliget etiamsi latere possit. Sibi enim est reus priusquam ceteris nec tam pudenda apud eum publicatio flagitii quam conscientia est. 26 In Ambrose, De officiis, 3, 6, 39, (ed. Testard, supra, n. 25), p. 99, we find the businessmen claiming the following against their detractors: Num industria in crimen vocatur? Num diligentia reprehenditur? Num providentia vituperatur?. This is exactly the kind of argument put forward by the scholastics of the early modern period to defend the Merchant of Rhodes right not to disclose information about future market conditions.

9 W. Decock, J. Hallebeek / Tijdschrift voor Rechtsgeschiedenis 78 (2010) profit-making through speculation and industry nothing less than robbery and theft 27. To conclude, in sharing Cicero s bias against trade and commerce, Ambrose sharply opposes the business man s wisdom of the flesh to divine wisdom. Against the background of the renaissance of cities and commerce from the 12th century onwards, his younger Christian colleagues would be urged to take a more nuanced view Late Medieval discussions from Aquinas to Summenhart Intrinsic defects There is hardly any authoritative work with stronger influence on the early modern scholastic tradition than Thomas Aquinas Summa Theologiae, which in the early sixteenth century replaced the Sententiae of Peter Lombard (ca ) as a textbook for theology students throughout Europe. In the part of this magnum opus mainly dealing with moral theological and legal issues, and known as the Secunda secundae, Aquinas tackles the question of defects in the quality of the merchandise (quaestio 77, article 3). This was probably written between 1270 and As stated above, intrinsic defects in the merchandise are those defects which by themselves are determinative for the just price. We will focus on one of these, namely defects in the quality (qualitas), and the question of whether or not the seller has a duty to disclose them. These defects often specifically denoted in Latin by the term vitia at least from Vitoria s commentary on Aquinas onwards should be distinguished from defects in the substance (species), on the one hand (namely those concerning the essence of the object sold) and defects in the quantity (quantitas), on the other (namely those concerning the number, weight or measure of the merchandise) 28. Regarding the question whether or not the seller is obliged to disclose the defects in the quality, various ideas, handed down from the past, were relevant. First, Aquinas adopts a distinction deriving from Roman law (D. 21,1,14,10) between latent and patent defects. In the case of visible, apparent defects (vitia manifesta), such as a horse with one eye, there is no need to mention it to the buyer as long as the selling price is in conformity with the defective merchandise a conclusion which no doubt derives from Aristotle s idea of equality in exchange. In the case of latent defects (vitia occulta), a duty of disclosure only exists if they cause harm (damnum) as when the buyer pays too high a price or if they cause risk ( periculum) as when the house sold is falling into ruins, the horse is lame 27 Ambrose, De officiis, 3, 6, 44, (ed. Testard, supra, n. 25), p Thomas Aquinas, Summa Theologiae, IIaIIae, quaest. 77, art. 2, concl. We consulted the following edition: Secunda Secundae Summae Theologiae a quaestione 57 ad quaestionem 122, in: Thomae Aquinatis Opera omnia iussu impensaque Leonis XIII edita, tom. 9, Romae 1897, p

10 98 W. Decock, J. Hallebeek / Tijdschrift voor Rechtsgeschiedenis 78 (2010) or food is contaminated. Otherwise the seller may keep silent about the latent defects as long as the price is in accordance with the defective state of the thing sold. This idea may be prompted by the fact that buyers are familiar with the market prices and can perceive a reduced price as a quality indicator 29 : I reply that it is always illicit to cause harm or risk to another person, although it is not necessary for a human being always to provide his fellow man with help and advice to the latter s advantage. That is only necessary in some specific situations, for example when the other is submitted to his care, or when there is no other person who can help him. Now, the seller who offers something for sale, causes the buyer harm or risk by the mere fact that he offers him something defective, if that defect can result in harm or danger. The seller causes harm when the thing offered for sale actually needs to be priced much lower on account of its defect, but he does not reduce the price. The seller causes risk if on account of its defect the use of the thing is impossible or dangerous, for example, when someone sells a lame horse as if it were fleet of foot, or a dilapidated house as if it were solid, or contaminated food as if it were good. So whenever such defects are latent and the seller does not disclose them, the sale will be illicit and fraudulent, and he will be obliged to pay damages. If, however, a defect is apparent, for instance when a horse has only one eye, or if a thing is still likely to be useful to other persons though it is not any longer to the seller himself, no duty of disclosure exists provided that the seller reduces the price in accordance with the seriousness of the defect. For otherwise the buyer would wish the price to be reduced further than is necessary. Consequently, it is allowed for a seller to secure his own protection by not disclosing the defect in his merchandise. Aquinas had dealt with a similar question a few years earlier, probably in the Advent of 1269, in quodlibetal question II, quaest. 5, art. 2. Yet there 29 See Thomas Aquinas, IIaIIae (ed. Leonina, supra, n. 28), quaest. 77, art. 3, concl., p. 152: Respondeo dicendum quod dare alicui occasionem periculi vel damni semper est illicitum: quamvis non sit necessarium quod homo alteri semper det auxilium vel consilium pertinens ad eius qualemcumque promotionem, sed hoc solum est necessarium in aliquo casu determinato, puta cum alius eius curae subdatur, vel cum non potest ei per alium subvenire. Venditor autem, qui rem vendendam proponit, ex hoc ipso dat emptori damni vel periculi occasionem quod rem vitiosam ei offert, si ex eius vitio damnum vel periculum incurrere possit: damnum quidem, si propter huiusmodi vitium res quae vendenda proponitur minoris sit pretii, ipse vero propter huiusmodi vitium nihil de pretio subtrahat; periculum autem, puta si propter huiusmodi vitium usus rei reddatur impeditus vel noxius, puta si aliquis alicui vendat equum claudicantem pro veloci, vel ruinosam domum pro firma, vel cibum sive venenosum pro bono. Unde si huiusmodi vitia sint occulta et ipse non detegat, erit illicita et dolosa venditio, et tenetur venditor ad damni recompensationem. Si vero vitium sit manifestum, puta cum equus est monoculus; vel cum usus rei, etsi non competat venditori, potest tamen esse conveniens aliis; et si ipse propter huiusmodi vitium subtrahat quantum oportet de pretio: non tenetur ad manifestandum vitium rei. Quia forte propter huiusmodi vitium emptor vellet plus subtrahi de pretio quam esset substrahendum. Unde potest licite venditor indemnitati suae consulere, vitium rei reticendo.

11 W. Decock, J. Hallebeek / Tijdschrift voor Rechtsgeschiedenis 78 (2010) the distinction between latent and patent defects is lacking. Nor is the possible danger for the buyer mentioned. Aquinas merely states that defects do not have to be disclosed as long as the price corresponds to the defective nature of the thing sold. Two late Medieval theologians, steeped in the Thomistic tradition, also exercised a considerable influence on the doctrines of the early modern scholastics. Both taught theology at the recently founded University of Tübingen (1477). The first is Gabriel Biel, who in his commentary on the Sentences of Peter Lombard, first rephrases the teachings of Aquinas from the Summa Theologiae. He writes that in the case of latent defects it is allowed to conceal them, if that does not cause the buyer to suffer injury or run risks. The reason is that, otherwise, the buyer wants to pay even less than the just price, and, as Aquinas states, the seller may justly secure his own protection. Biel then continues and refers to the following distinction. Firstly, it is not allowed to keep silent about defects if the buyer would not have bought at all, had he known of these defects. For another, a seller is allowed to conceal defects if the buyer would have bought the merchandise regardless, albeit it for a lower price, as long as the seller adjusts the selling-price to the defective quality 30. Although Biel ascribes this distinction merely to the canonist Abbas Panormitanus ( ) 31 and the Italian Franciscan Angelo Carletti de Chivasso (ca ) 32, it is definitely reminiscent of the Glossators subdivision of deceit into dolus causam dans and dolus incidens. The other Tübingen professor of theology is Konrad Summenhart, usually referred to as Conradus. Unlike Gabriel Biel, he is frequently quoted in the teachings of the early modern scholastics on qualitative defects. In his influential work De contractibus licitis atque illicitis, Summenhart deals extensively with the sale of defective merchandise and the seller s obligation to inform the buyer. He holds that a seller in good faith is not liable for any of the intrinsic defects, namely those in the substance, the quality and the quantity. His ignorance should not imply a gross mistake (crassa), however, and it is not allowed to deliberately sell something defective. In this context, Summenhart draws a distinction, resembling that of Biel just mentioned, and corresponding with the difference between the Roman actio redhibitoria and actio quanti minoris, viz. between the situation where the buyer wants to restore the object in exchange for the price upon noticing the defect, and the event in which he merely claims reduction of the price. In the latter case he was willing to 30 G. Biel, Collectorium circa quattuor libros Sententiarum, lib. 4, pars 2 (dist ), (ed. W. Werbeck / U. Hofmann), Tübingen 1977, dist. 15, quaest. 10, art. 3, dub. 1, p Abbas Panormitanus (Nicolaus de Tudeschis), Commentaria in tertium decretalium librum, [Opera Omnia, tom. 6], ad X. 3, 19, 4,Venetiis 1588, f. 141ra, num Angelo Carletti de Chivasso, Summa angelica de casibus conscientiae, [s.l.] 1520, s.v. emptio et venditio, f. 65rb 65va, n. 8.

12 100 W. Decock, J. Hallebeek / Tijdschrift voor Rechtsgeschiedenis 78 (2010) buy the object, albeit for a lower price, even when he was aware of the defect. Again this distinction is probably derived from the Medieval Roman law distinction between dolus causam dans and dolus incidens technical vocabulary Summenhart explicitly uses in the rest of his treatment. If the buyer had been willing to pay a lower price which corresponds to the extent of the defect, the seller is obliged to restore the balance. If the buyer, however, would by no means have bought the object, he is erring and not consenting to the contract. In that case, no matter what happens according to the forum externum, in the forum animae the full price must be given back 33. Moreover, if the seller suspects that the buyer does not know of the defect, it does not matter, according to Summenhart, whether the defect is apparent or latent. A defect can be apparent, that is recognizable, and yet the seller may have to assume that for the specific buyer it is hidden anyway. Hence, defects apparent in that way are still to be considered as latent Extrinsic defects Although Aquinas was not addressing the question of pre-contractual duties to inform about circumstances extrinsic to a contract as such, he made a vital contribution to root out such obligations. He does so within the context of his discussion of the duty of disclosure of intrinsic defects which has been expounded above. Those who hold that a seller is under no obligation to inform about the defects of the merchandise argue, amongst other things, that there is a similarity between the non-obligation of the Merchant of Rhodes to tell about the future abundance in goods, and the non-obligation of a seller to disclose his information about latent defects 35. Importantly, Aquinas rejects this analogy established by his opponents between the case of the Merchant of Rhodes and the case of intrinsic, latent defects in the goods sold. Consequently, he denies that from the non-obligation of disclosure in the case of the Merchant of Rhodes one can infer the same principle of non-obligation in the case of latent defects. For the first time, then, though it is not expressed in the abstract, the distinction between extrinsic and intrinsic qualities of a purchase-sale contract is brought to bear upon the question of duties of disclosure 36 : 33 Conradus Summenhart, Septipertitum opus de contractibus, Augustae Vindelicorum 1515, tract. 3, quaest. 54, par. Prima conclusio [without foliation]. 34 Summenhart, De contractibus (supra, n. 33), tract. 3, quaest. 54, par. Corollarium primum [without foliation]. 35 Thomas Aquinas, Summa Theologiae (ed. Leonina, supra, n. 29), IIaIIae, quaest. 77, art. 3, arg. 4, p. 152: Praeterea, si aliquis teneatur dicere defectum rei venditae, hoc non est nisi ut minuatur de pretio. Sed quandoque diminueretur de pretio etiam sine vitio rei venditae, propter aliquid aliud, puta si venditor deferens triticum ad locum ubi est carestia frumenti, sciat multos posse venire qui deferant; quod si sciretur ab ementibus, minus pretium darent. Huiusmodi autem non oportet dicere venditorem, ut videtur. Ergo, pari ratione, nec vitia rei venditae. 36 Thomas Aquinas, Summa Theologiae (ed. Leonina, supra, n. 29), IIaIIae, quaest. 77, art. 3,

13 W. Decock, J. Hallebeek / Tijdschrift voor Rechtsgeschiedenis 78 (2010) A defect in something immediately causes that thing to be priced lower now than it seems to be worth. In our case, however, the grain is expected to be priced lower in the future because of the arrival which is unknown to the buyers of additional merchants. Hence, a seller demanding the price which he finds in the market does not seem to act against justice if he does not disclose his information about the future. Still, if he were to do so, or if he lowered his price, it would be exceedingly virtuous on his part, although he does not seem to be under an obligation as a matter of justice to do so. Unfortunately, Thomas Aquinas did not elaborate on this short but highly influential statement. In any event, his commentators invariably considered him to be the chief scholastic authority to have defended the Merchant of Rhodes non-duty of disclosure. This did not settle the dispute, however. The authoritative foundations for disagreement were laid in the law faculty, in particular, by none less than Bartolus de Saxoferrato. In his commentary on D. 19,1,39, which invalidates a seller s attempt to discharge himself from liability for eviction of servitudes attached to the land he sells, he introduces a problem that is not wholly identical to Cicero s Merchant of Rhodes, but still touches upon a similar question: namely insider information. Assume that the public authorities will decree to lower the official price of a certain commodity, and you as a particular vendor, familiar with the administration, know about this future decree through insider information. Are you liable for the damage which a buyer incurs because you do not disclose your insider information to him? Bartolus definitely thinks you are. A seller is under an obligation to share his insider information with the buyer, according to the most eminent amongst the commentators, because not so doing amounts to fraud (circumventio) 37. In order to support his view, Bartolus refers to the gloss Contra ad D. 1,3,29, which assimilates acts that go against the spirit of the law (in fraudem legis) to acts that go against the letter of the law (contra legem). Accursius, however, did not address the question of the Merchant of Rhodes. In his commentary on this famous passage, and by making reference to Guilelmus de Cuneo (ca ), Bartolus recounts the story of a seller from the leading classes ad 4, p : Ad quartum dicendum quod vitium rei facit rem in praesenti esse minoris valoris quam videatur, sed in casu praemisso, in futurum res expectatur esse minoris valoris per superventum negotiatorum, qui ab ementibus ignoratur. Unde venditor qui vendit rem secundum pretium quod invenit, non videtur contra iustitiam facere si quod futurum est non exponat. Si tamen exponeret, vel de pretio subtraheret, abundantioris esset virtutis, quamvis ad hoc non videatur teneri ex iustitiae debito. 37 Bartolus a Saxoferrato, In secundam Digesti veteris partem, ad D. 19,1,39, Venetiis 1570: Ordinationem qui sciens factam per superiorem quod aliqua res vendatur minori pretio solito, si vendit pro maiori pretio quam fuerit ordinatum, tenetur. ( ) Quia videtur facere causa circumveniendi eo ipso, quod scit. ( ) Vendidit tibi frumentum pro maiori pretio nec certioraverit te. Certe videtur teneri ad interesse, et ita glos. sensit in l. Contra legem facit, tit. de legibus [D. 1,3,29].

14 102 W. Decock, J. Hallebeek / Tijdschrift voor Rechtsgeschiedenis 78 (2010) who does not disclose his insider information about the future change in the official price of grain as an instance of behaviour that goes against the prohibition to act in contravention of the spirit of the law. Bartolus s opinion is not just ephemeral. One century later, it lives on word for word in the Singularia of the jurist and merchant Ludovicus Pontanus Romanus ( ) 38. With the greatest authorities in the law and theology faculties, respectively, diverging on the duty to inform about future market conditions, it should not come as a surprise that by the end of the 15th century, we find the theological tradition split in two. In his commentary on the Sentences, Biel bases himself on Aquinas and simply states that as a matter of justice a merchant is neither under an obligation to reduce the price of the thing sold nor under a duty to inform. He motivates this conclusion by pointing out the infirm and uncertain character of the Merchant of Rhodes knowledge about the future: all future events are contingent and unpredictable 39. This is an important argument, preparing some of the early modern scholastics view of business as an aleatoric game in which making profits on the basis of a dominant knowledge position is thought to be allowed precisely to the extent that a merchant benefiting from a dominant knowledge position actually can turn out to be mistaken. No less influential, but far more subtle and extended was the discussion of the Merchant of Rhodes in yet another late Medieval theologian from Tübingen. In his treatise on contracts, Konrad Summenhart is the first among the theologians to take and defend the view that there exists a duty of disclosure, or at least a duty to reduce the price. The bottom line of his argument is that an imminent future supply of goods already influences the current market price in the present, and that a buyer who is not informed does not voluntarily consent to the purchase-sale agreement but rather does so on account of error 40. Moreover, a seller who thinks, or is to be expected to think, that the price of his goods will sink in the near future actually knows that the monetary value or price of his goods does not correspond any more to its real value. Hence, he deceives the buyer either on purpose or on account of crass ignorance. In Summenhart s view, the uncertainty surrounding the imminent abundance explains, however, why the seller can still ask 9 if the current price is 10 and the future price will be Ludovicus Pontanus Romanus, Singularia, Lugduni 1541, [s.f.], num. 282: Numquid si sum magnus mercator et sciam in consilio de ordine dato quod cras minus valebit frumentum. Et ego vendidi non notificando emptoribus de ordinatione predicta. Dicendum quod contrahentes possunt agere contra me ad interesse suum. 39 Biel, Collectorium (supra, n. 30), dist. 15, quaest. 10, art. 3, dub. 3, p. 208: Accedit ad idem quod future contingentia sunt incerta et multis accidentibus possunt impediri. Ideo talis venditor non est certus, utrum supervenient quos putat superventuros. 40 Summenhart, De contractibus (supra, n. 33), tract. 3, quaest. 62, par. Tertius modus dicendi.

15 W. Decock, J. Hallebeek / Tijdschrift voor Rechtsgeschiedenis 78 (2010) All in all, then, Summenhart arrives more or less at the same practical conclusions as Aquinas or Biel despite the differences underlying their theoretical assessment of the Merchant of Rhodes. It is worthy of mentioning, in this respect, that Summenhart spends long hours on developing an intermediary position that contains a lot of ideas on which the early modern scholastics would draw. According to this intermediary position, the Merchant of Rhodes actually subdivides into three categories. In the first case, the seller needs to sell at the current market price without disclosing his information for the very reason that he cannot avoid proper damage without so doing. The buyer, for his part, is either buying for speculative reasons, or risks to incur a damage that is no greater in magnitude than the damage the seller seeks to avoid. In this event, the seller is under no obligation to share his information with the buyer for the simple reason that sound and sane charity begins with self-love (ordinata charitas incipit a seipsa) 41. The second category concerns parties who both have a chance of benefiting from that contract even though the current market price is demanded, because the seller as well as the buyer are likely to be able to sell these goods in the future for the same or a higher price in the same or another place. In this case, the Merchant of Rhodes can legitimately conceal his information because it is allowed to prefer his own gain to that of another person (licitum est mihi meipsum promovere, proximo neglecto) 42. Summenhart cannot approve, not even temporarily, of the third case, however. There, a seller is not going to incur any damage by disclosing his information, whereas a sale to the current market prices always is to the detriment of the buyer. This is a case of unjust enrichment, where the profit made by the vendor is directly based on the loss that falls on the buyer. Significantly, in all three of the cases, Summenhart describes the relationship between seller and buyer in terms of a competition and contest (certamen). This view will reappear in the early modern scholastic tradition. 3. Early Modern Scholasticism 3.1. Introductory remarks A number of seminal contributions written by legal historians on early modern scholasticism have seen the light in recent years 43. It is to the credit 41 Summenhart, De contractibus (supra, n. 33), tract. 3, quaest. 62, par. Secundus modus dicendi. 42 Summenhart, De contractibus (supra, n. 33), tract. 3, quaest. 62, par. Secundus modus dicendi. 43 For references to recent contributions on scholastic legal thought, see W. Decock, Jesuit freedom of contract, Tijdschrift voor rechtsgeschiedenis, 77 (2009), p This article also contains a more detailed historical and philosophical contextualization of early modern scholastic legal thought. As to the philosophical context of early modern scholastic thought, a

16 104 W. Decock, J. Hallebeek / Tijdschrift voor Rechtsgeschiedenis 78 (2010) of the scholastics of the 16th and 17th centuries to have reached a fruitful synthesis of some of the most important intellectual traditions that previously prevailed in Europe. These range from Aristotelian-Thomistic natural law philosophy, Renaissance humanism, to the late Medieval ius commune. This synthesis was then passed on to prominent natural law jurists such as Hugo Grotius ( ) and Samuel von Pufendorf ( ). The scholastic movement of the 16th and 17th centuries is not of a purely theoretical nature, however, in spite of what recent publications often continue to suggest. No matter how influential and compelling some of their commentaries on On the laws (De legibus), or On justice and law (De iustitia et iure) 44, may prove to be to philosophers of law, early modern scholastic treatises are first and foremost the written imprints of very practical and dayto-day conflict management at a time when the Catholic Church, and its theologian-jurists in particular, still had a huge impact on real life decisions. If anything, the early modern scholastics acquainted themselves with the traditions mentioned above in order to find and forge adequate technical devices and tools to deal with the highly practical problems they were faced with as consultants to politicians and businessmen. It is well-known that they were heavily involved in finding solutions to the real-life questions that posed themselves in the wake of the discovery of the Americas. The status of the Indians, the relations between various nations, and the regulation of commercial activities on a globalized scale are but some of the pressing issues with which the Spanish empire was confronted, and the solutions for which they delegated to the theology faculty of the University of Salamanca amongst other centres of academic excellence on the Iberian peninsula. The revived scholastic movement in the early modern period is also indicative of the Catholic Church s attempt to maintain its control over increasingly independent individuals and states. By giving consultancy to political authorities and to the business elite they hoped to consolidate their normative power in spite of the opposite tendencies ensuing from the Reformation and political absolutism. This search for normative power only increased after the Council of Trent. At the turn of the 17th century, we find the Jesuit order continuing and reinforcing the scholastic tradition which they inherited from the Dominicans, amongst other religious orders. With Jesuits like Luís de Molina and Leonardus Lessius we witness a growing juridification of the moral theological fundamental contribution in an equally fundamental volume is M.W.F. Stone, Scrupulosity, probabilism, and conscience, The origins of the debate in early modern scholasticism, in: H. Braun / E. Vallance (eds.), Contexts of conscience in early modern Europe, , London 2004, p and p These various types of literature stem from commentaries on different parts of Thomas Aquinas Summa Theologiae, notably on IaIIae, q and IIaIIae, q , respectively. Their autonomization is not only indicative of the growing importance of legal and moral affairs for the early modern scholastics, however, but also of the relative autonomy and independence of the latter authors with regard to Thomas s teachings.

17 W. Decock, J. Hallebeek / Tijdschrift voor Rechtsgeschiedenis 78 (2010) discourse. After all, they conceived of themselves as judges and jurists in what is to be understood literally as the court of conscience (forum conscientiae / forum internum). Through a meticulous analysis of both reality and legal theory, the Jesuits tried to find out which obligations and which rights belonged to an individual in very concrete circumstances as a matter of natural as well as positive law. The outcome of a judgment in the court of conscience not only bore upon the confessant s soul, but also on his patrimonial rights and liabilities. Ever since Augustine ( ) had said that no sin could be forgiven unless the balance which had been upset between people and their goods was restored, restitution had been at the core of the moral theological and canonical debate 45. Still more symptomatic of the real impact in the external court (forum externum) of sentences pronounced in the court of conscience, are the legal remedies before the external courts that follow from them 46. Against the background of the intense interconnectedness between the external and the internal court, it should not come as a surprise that the early modern scholastics constantly considered the duties to inform both from the perspective of the internal and the external court. Eventually, this exercise would even give rise to the birth of a new genre of comparative legal literature, namely Differentiae inter utrumque forum, iudiciale videlicet et conscientiae, as the Carthusian Juan de Valero ( ) entitled his monograph Intrinsic defects During the first half of the sixteenth century, the Dominican theologians were by far the most famous and prolific members of the early modern scholastic movement that tried to re-think the Thomistic heritage in light of the emergence of the New World. One of the first Dominicans to lecture in Salamanca on the basis of Aquinas Summa Theologiae was Francisco de Vitoria. After expounding the teachings of Aquinas, Vitoria treats of a doctrine not yet present in Aquinas s Summa Theologiae nor in the commentary of Tommaso de Vio (Cardinal Cajetan, ) 47, namely that when the buyer would not have bought the merchandise at all, had he known of the defect, he has entered into the contract involuntarily and, as a consequence, the contract is void 48. Vitoria explains that this view is based on the teachings 45 See Augustine, Epistula 153, num. 20 [CSEL 44, III, 419]: Si enim res aliena, propter quam peccatum est, cum reddi possit, non redditur, non agitur poenitentia, sed fingitur: si autem veraciter agitur, non remittetur peccatum, nisi restituatur ablatum; sed, ut dixi, cum restitui potest. This text was included by Gratian in C. 14 q. 6 c See Joannes de Valero, Differentiae inter utrumque forum, iudiciale videlicet et conscientiae, Cartusiae Maioricarum 1616, praeludia [especially num. 4 5, and num , p. 1 2]. 47 The commentary of Cajetanus on the Summa Theologiae was edited together with the textcritical edition of Thomas s text in the Leonine edition (supra, n. 28). 48 Franciscus de Vitoria, De Justitia (ed. V. Beltrán de Heredia), vol. 2, Madrid 1934; ad IIamIIae, quaest. 77, art. 3, p

18 106 W. Decock, J. Hallebeek / Tijdschrift voor Rechtsgeschiedenis 78 (2010) of Aristotle and that it was already defended in the Summa of Sylvester Mazzolini da Prierio ( ) 49. We have also encountered this idea, although less explicitly, in Summenhart s discussion of intrinsic defects. Vitoria himself, however, rejects this view by making reference to Cajetan. The involuntary element in the contract does not render it void, provided that the seller lowers the price in accordance with the defect, and that the defect poses no risks to the buyer. The chief basis for Vitoria s main argument is that a marriage entered into under false presumptions, is nevertheless valid. Granted, a contract entered into involuntarily can be inequitable, but only when one party is forced into it by the other party. In that case the contract is indeed void. Subsequently, Vitoria deals with the question, whether it is allowed to keep silent about defects, when selling at a just price, even where according to others the contract would be void in view of the fact that the buyer would not have bought at all, had he been aware of the defects. There are three different opinions concerning this question. All three can be defended with reasonable arguments, but Vitoria himself prefers the third opinion. According to the first opinion, it is allowed to keep silent about a defect, as long as there exists no danger for the buyer and if the price is just. This opinion, which seems to be in conformity with the teachings of Aquinas, was rejected by the Scottish philosopher John Mair (Johannes Maior, ) in his commentary on the Sentences of Peter Lombard. Mair considered such an act sinful 50. Vitoria himself thinks that it is not allowed to deny defects when the buyer explicitly asks about their existence. Yet even though denying the existence of the defect is a sinful act, he still considers the sale contract to be valid. According to the second opinion it is better to inform the buyer when one of the features belonging to the natural condition of the object to be sold is lacking. A horse, for example, should not be lame. If the seller keeps silent about such latent defects, the buyer will be deceived and can claim rescission of the contract. If the defects are apparent, however, it is the buyer who should watch out. The third opinion consists in a middle course between the first two. The seller may keep silent about defects, when not explicitly questioned by the buyer. The main argument to support this opinion is that third parties (bystanders) do not need to interfere and have no duty to take care of the buyer s interest. They can also keep silent, although knowing that the buyer is about to buy something defective. If the seller conceals the defect upon explicit questions by the buyer, on the other hand, the contract may be rescinded and the buyer can claim damages. 49 Sylvester Prierias, Summa summarum, [Lugduni 1524], s.v. emptio, f. 213rb 213va, num. 20. Other writers also refer to Summenhart. 50 Johannes Maior, In quartum sententiarum quaestiones, Parisiis 1516, dist. 15, quaest. 40, f. 111v.

19 W. Decock, J. Hallebeek / Tijdschrift voor Rechtsgeschiedenis 78 (2010) As stated above, this third opinion is the one preferred by Vitoria, albeit under the restriction that we are speaking here about defects in the quality, not about errors concerning the origin or age of the merchandise. It is striking to note that Vitoria emphasizes time and again that it does not pertain to the seller s duty to take care of the buyer s interest. Rather, he should act in his own interest, provided that he acts justly and without sinning. Aquinas had already stated that the seller is not obliged to disclose apparent defects. It was disputed, however, how this remark should be understood. Vitoria mentions the opinion of John Mair, for example, although eventually he does not seem to agree with his Scottish master. Following Antipater and criticizing Diogenes of Babylon, Mair holds that the seller is obliged to mention the defect, whenever it is not noticed by the buyer, irrespective of whether the defect is latent or apparent 51. We should understand the scholars who state that an apparent defect does not have to be mentioned, as if they are referring to the situation the buyer had noticed it. In Mair s view, it is not fair for a seller to tell the buyer that the latter has a duty of enquiry (explora diligenter qualis sit) rather than he himself having a duty of disclosure. But Vitoria seems to disagree with this, and simply goes on to describe still other, legitimate interpretations of Aquinas s remark. One can say that Aquinas was talking about positive, human law, when he said that it is not necessary to mention an apparent defect, but that in the forum conscientiae the difference between latent and apparent defects is irrelevant. Or one can say that the buyer owes it to his own negligence (sibi imputetur), if he fails to notice an apparent defect. In his commentary on article 3, the Dominican theologian Domingo de Soto treats the question concerning the seller s duty to disclose defects in the quality almost exclusively from the point of view of the forum conscientiae, leaving the forum externum explicitly to the jurists 52. He first repeats the doctrine of Aquinas: the seller may keep silent as long as there is no danger and the price is just. Subsequently he states that this rule is in conformity with the opinion of the French theologian Jean Gerson ( ) 53. It is not in line with Summenhart s opinion, however, because the latter wants to increase the requirements for a non-duty of disclosure. Summenhart thinks that when the seller knows, or considers it to be likely that the buyer would not enter into the sale, if he knew the defects, he is under a duty to inform the buyer an opinion which we have seen echoed in Mair a few decades later. Keeping silent in such a case would be unjust. This opinion of 51 Cf. Maior, In quartum (supra, n. 50) dist. 15, quaest. 40, f. 111v. 52 Dominicus Sotus, De iustitia et iure (with an introduction by V.D. Carro and a Spanish translation by M. González Ordóñez), Madrid 1968, lib. 6, quaest. 3, art. 2, p Cf. Regulae Morales, n. 84, in: Jean Gerson, Oeuvres complètes (ed. P. Glorieux), vol. 9, Paris 1973, p

20 108 W. Decock, J. Hallebeek / Tijdschrift voor Rechtsgeschiedenis 78 (2010) Summenhart s was also defended by the canonist Abbas Panormitanus 54 and by Sylvester. Soto himself returns to the original standpoint of Thomas Aquinas. Like Aquinas and Vitoria, Soto rejects the idea that an involuntary consent to the sale results in a void contract, at least when the buyer does not run a risk because of the defect, and the price is lowered. If Summenhart and his supporters are right, contracts would also be void in case of dolus incidens, but such an opinion they do not defend. Following Aquinas, Soto maintains that there is no duty to inform the buyer about patent defects. The seller may keep silent, as may any third party, because whoever exercises his own right does not do any injustice to his fellowman. All this seems to be in conformity with the ideas of Vitoria, but at this stage Soto introduces what appears to be a new and third requirement, in addition to those already mentioned in Aquinas (no injury and no risk for the buyer), namely the requirement of subjective utility (res sit emptori usui). The seller is only allowed to keep silent, when he does not realize that the defect makes the object sold unusable for the specific buyer he is contracting with. When selling a lame horse, the seller may conceal the defect for an old physician, who is looking for a calm animal, but not for a young nobleman who wants to participate in the horse races 55. In case of patent defects, Soto remarks that there is no need to mention these and that the buyer, unless he is blind, may be presumed to enter knowingly into the contract. Soto does not seem to take into account the fact that the buyer may be inexperienced. Vitoria and Soto reject the opinion that when the buyer would not have bought at all, had he known of the defects, the contract would be void. That opinion, which can be found in Panormitanus, Summenhart and Sylvester, was based on the distinction between dolus causam dans and dolus incidens, as well as on the Aristotelian idea that acts motivated by ignorance are involuntary. In the work of Juan de Medina, on the contrary, the legal distinction just mentioned appears to play a predominant role 56. This is striking, since in the case of the Merchant of Rhodes, as we will see below, Medina also follows Summenhart closely. He writes that in the case of dolus dans causam contractui it is not sufficient merely to adapt the selling price in accordance with the defects, for the seller, in his capacity as salesman (ex 54 See Abbas Panormitanus, Commentaria (supra, n. 31), ad X. 3, 19, 4, f. 141rb va, n. 6. What Panormitanus actually says is that the seller has a duty to inform the buyer, if the latter is not careful (minus diligens) and is not watching very closely (et non bene prospexit). 55 This and similar examples can be found in other writers. In Domingo de Báñez ( ) the young nobleman is a soldier who wants to go to battle. See Dominicus Báñez, Decisiones de iure et iustitia, Venetiis 1595, ad IIamIIae, quaest. 77, art. 3, p In Luís Lopez ( 1596) one can sell a blind horse to someone who wants to use the animal for a treadmill. See Ludovicus Lopez, Tractatus de contractibus et negotiationibus, Lugduni 1593, lib. 1, cap. 45, p Joannes de Medina, De poenitentia, restitutione et contractibus, Ingolstadii 1581 (reprint Farnborough 1967), tom. 2, quaest. 34, p

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